GREEN STREET STEWARDS Weed Identification Guide REVISED ON MAY 2017 Green Street Stewards: Weed Identification Guide UPDATED: MAY 2017 AMARANTH 1 FIELD BINDWEED 18 BITTERCRESS 2 HIMALAYAN BLACKBERRY 19 BLACK MEDIC 3 LAMBSQUARTER 20 CANADA THISTLE 4 LONDON ROCKET 21 CATCHWEED 5 MOUSE-EAR CRESS 22 CHICORY 6 MULLEIN 23 COMMON CHICKWEED 7 NIGHTSHADE 24 COMMON GROUNDSEL 8 NIPPLEWORT 25 COMMON MALLOW 9 PRICKLY LETTUCE 26 COMMON VETCH 10 PROSTRATE KNOTWEED 27 CREEPING WOODSORREL 11 RED SORREL 28 DANDELION 12 ROBERT GERANIUM 29 DEADNETTLE 13 SOWTHISTLE 30 DOCK 14 TRAVELER’S JOY 31 DOVEFOOT GERANIUM 15 WHITE CAMPION 32 ENGLISH IVY 16 WILD CARROT 33 CONTENTS FALSE DANDELION 17 WILLOWHERB 34 www.portlandoregon.gov/bes early plant AMARANTH Amaranthus spp. flowering DIGDIG MORE INFORMATION: OSU Weed Identification Guide–Amaranthus mature plant PREVIOUS MAIN NEXT WEED MENU WEED 1 BITTERCRESS Cardamine spp. early plant seed PULL MORE INFORMATION: http://mint.ippc.orst.edu/bittercress.htm mature plant PREVIOUS MAIN NEXT WEED MENU WEED 2 BLACK MEDIC Medicago lupulina early plant flowering and seed DIG MORE INFORMATION: mature plant with www.ipm.ucdavis.edu/PMG/WEEDS/black_medic.html flower and seed PREVIOUS MAIN NEXT WEED MENU WEED 3 CANADA THISTLE Cirsium arvense early plant flowering DIG MORE INFORMATION: http://mint.ippc.orst.edu/canthistle.htm mature plant PREVIOUS MAIN NEXT WEED MENU WEED 4 CATCHWEED Galium aparine early plant flowering PULL MORE INFORMATION: http://mint.ippc.orst.edu/catchbedstraw.htm mature plant PREVIOUS MAIN NEXT WEED MENU WEED 5 CHICORY Cichorium intybus early plant seeds flower DIG MORE INFORMATION: plants.usda.gov/core/profile?symbol=CIIN mature plant PREVIOUS MAIN NEXT WEED MENU WEED 6 COMMON CHICKWEED Stellaria media early plant flower PULL MORE INFORMATION: http://mint.ippc.orst.edu/chickweed.htm mature plant PREVIOUS MAIN NEXT WEED MENU WEED 7 COMMON GROUNDSEL Senecio vulgaris early plant flowering with seeds PULL MORE INFORMATION: http://mint.ippc.orst.edu/groundsel.htm NEXT PREVIOUS MAIN 8 mature plant WEED MENU WEED COMMON MALLOW Malva neglecta mature plant early plant flowering DIG MORE INFORMATION: http://montana.plant-life.org/index.html PREVIOUS MAIN NEXT WEED MENU WEED 9 COMMON VETCH Vicia sativa early plant flowering seeds PULL MORE INFORMATION: http://www.pnwflowers.com/flower/vicia-sativa mature plant PREVIOUS MAIN NEXT WEED MENU WEED 10 CREEPING WOODSORREL Oxalis corniculata early plant seeds DIG yellow flowers MORE INFORMATION: www.ipm.ucdavis.edu/PMG/WEEDS/ creeping_woodsorrel.html mature plant PREVIOUS MAIN NEXT WEED MENU WEED 11 early plant DANDELION Taraxacum officinale seeds DIG MORE INFORMATION: OSU Weed Identification Guide–Dandelion mature plant PREVIOUS MAIN NEXT WEED MENU WEED 12 DEADNETTLE Lamium purpureum early plant flowering PULL MORE INFORMATION: OSU Weed Identification Guide–Dead Nettle mature plant PREVIOUS MAIN NEXT WEED MENU WEED 13 early plant DOCK Rumex spp. seeds DIG MORE INFORMATION: plants.usda.gov/core/profile?symbol=RUCR flower PREVIOUS MAIN NEXT WEED MENU WEED 14 DOVEFOOT GERANIUM Geranium molle early plant flowering DIG MORE INFORMATION: OSU Weed Identification Guide–Dovefoot Geranium mature plant PREVIOUS MAIN NEXT WEED MENU WEED 15 ENGLISH IVY Hedera spp. early plant seeds DIG MORE INFORMATION: www.portlandoregon.gov/parks/article/201781 mature plant PREVIOUS MAIN NEXT WEED MENU WEED 16 FALSE DANDELION Hypochaeris radicata early plant seeds DIG MORE INFORMATION: www.iewf.org/weedid/Hypochoeris_radicata.htm mature plant PREVIOUS MAIN NEXT WEED MENU WEED 17 FIELD BINDWEED Convolvulus arvensis early plant flowering PULL MORE INFORMATION: http://mint.ippc.orst.edu/fbindweed.htm flowering mature plant PREVIOUS MAIN NEXT WEED MENU WEED 18 HIMALAYAN BLACKBERRY early plant Rubus discolor seeds DIG MORE INFORMATION: http://www.pnwflowers.com/flower/rubus-discolor mature plant PREVIOUS MAIN NEXT WEED MENU WEED 19 LAMBSQUARTER Chenopodium spp. early plant flowering DIG MORE INFORMATION: mint.ippc.orst.edu/broadleaf.htmwww.ipm.ucdavis.edu/PMG/WEEDS/ lambsquarters.html mature plant PREVIOUS MAIN NEXT WEED MENU WEED 20 LONDON ROCKET Sisymbrium spp. early plant flowering PULL MORE INFORMATION: www.ipm.ucdavis.edu/PMG/WEEDS/london_rocket.html mature plant PREVIOUS MAIN NEXT WEED MENU WEED 21 MOUSE-EAR CRESS early plant Arabidopsis thaliana flowering PULL MORE INFORMATION: OSU Weed Identification Guide–Mouse-ear Cress mature plant PREVIOUS MAIN NEXT WEED MENU WEED 22 MULLEIN Verbascum spp. early plant flowering DIG MORE INFORMATION: www.cal-ipc.org/ip/management/plant_profiles/ Verbascum_thapsus.php mature plant PREVIOUS MAIN NEXT WEED MENU WEED 23 NIGHTSHADE Solanum spp. flowering with purple berries mature plant with white flowers flowering with berries DIG MORE INFORMATION: http://ipm.ucanr.edu/PMG/WEEDS/black_ nightshade.html PREVIOUS MAIN NEXT mature plant with purple flowers WEED MENU WEED 24 NIPPLEWORT Lapsana communis early plant flowering PULL MORE INFORMATION: OSU Weed Identification Guide–Nipplewort PREVIOUS MAIN NEXT mature plant WEED MENU WEED 25 PRICKLY LETTUCE early plant Lactuca serriola flowering with seeds DIG MORE INFORMATION: www.ipm.ucdavis.edu/PMG/WEEDS/prickly_lettuce.html PREVIOUS MAIN NEXT mature plant WEED MENU WEED 26 PROSTRATE KNOTWEED Polygonum aviculare early plant flowering DIG MORE INFORMATION: http://mint.ippc.orst.edu/pknotweed.htm mature plant PREVIOUS MAIN NEXT WEED MENU WEED 27 RED SORREL Rumex acetosella mature plant early plant flower/seeds DIG MORE INFORMATION: http://mint.ippc.orst.edu/redsorrel.htm PREVIOUS MAIN NEXT WEED MENU WEED 28 ROBERT GERANIUM Geranium robertianum early plant flowering with seeds PULL MORE INFORMATION: OSU Weed Identification Guide–Robert Geranium flowering mature plant PREVIOUS MAIN NEXT WEED MENU WEED 29 SOWTHISTLE Sonchus spp. early plant seed flowering DIG MORE INFORMATION: www.iewf.org/weedid/Sonchus_oleraceus.htm mature plant PREVIOUS MAIN NEXT WEED MENU WEED 30 TRAVELER’S JOY Clematis vitalba early plant seeds DIG MORE INFORMATION: www.pnwflowers.com/flower/clematis-vitalba mature plant PREVIOUS MAIN NEXT WEED MENU WEED 31 WHITE CAMPION Silene spp. early plant flowering DIG MORE INFORMATION: http://www.oardc.ohio-state.edu/weedguide/single_ weed.php?id=19 mature plant PREVIOUS MAIN NEXT WEED MENU WEED 32 WILD CARROT Daucus carota early plant early plant seed DIG MORE INFORMATION: OSU Weed Identification Guide–Wild Carrot flowering mature plant PREVIOUS MAIN NEXT WEED MENU WEED 33 early plant WILLOWHERB Epilobium spp. flowering seeds PULL MORE INFORMATION: www.ipm.ucdavis.edu/PMG/WEEDS/willowherbs.html PREVIOUS MAIN NEXT mature plant WEED MENU WEED 34 Green Street Stewards: Weed Identification Guide [email protected] www.portlandoregon.gov/bes/GreenStreetStewards ©City of Portland Bureau of Environmental Services WS 1735 MAY 2017 PREVIOUS MAIN WEED MENU.